<!DOCTYPE html>
<html lang="zh-cn">
<head>
	<meta charset="UTF-8">
	<title>Input</title>
</head>
<body>
	<form action="output.html" method="get">
		<input type="text" name="val" placeholder="请输入N的值">
		<button type="submit">提交</button>
	</form>
	<script>
	
	</script>
</body>
</html>